Explain the challenges in developing an accurate rating system for earthquakes. What kinds of variables are there?

What is the relationship between the wavelength of a wave and it's energy?

Ten students stand in a circle and are told to make a transverse wave. what best describes the motion of the students? each student bumps the shoulder of his or her neighbor. at the exact time, all students take a step to the right. the students skip clockwise, going in a circular motion. one at a time, each student lifts his or her hands up and then down.

Will you chech and finish these for me, because i am stumped with them.